From the Champions Choice web site:
The RWS R 50 is the cartridge of choice of numerous Olympic champions and world record holders. Due to the special manufacturing process, an unparalleled degree of precision and reliability is being achieved. Every lot is repeatedly checked and thoroughly tested for ballistics, gas pressure and circle of dispersion. Series by series with perfectly tuned components. This way, velocity fluctuations are almost non-existent. Ideal for the whole range of small-calibre rifles as well as free pistols, sport and standard pistols.
•Choice of numerous Olympic Champions
•Manufactured under special conditions for highest constancy and safety
•Velocity deviations are minimal
•Ideal for total range of small-bore rifles as well as free pistol
Made in Stadeln, Germany.
Dimensions:
Bullet weight: 2.6 grams / 40 grains
Profile: Round Nose
Velocity:
Muzzle: 330 (m/sec) / 1083 (ft/sec)
50m: 294 (m/sec) / 965 (ft/sec)
100m : 271 (m/sec) / 889 (ft/sec)
Energy:
Muzzle: 142 J / 105 (ft.lb)
50m: 113 J / 83 (ft.lb)
100m: 95 J / 70 (ft.lb)
The RWS R 100 is the preferred cartridge of internationally successful match shooters. High velocities in the supersonic range and excellent precision make the RWS R 100 the first choice for silhouette shooting with rifles and pistols. Suitable at 50 and 100 m. Please inquire about the valid regulations of the IBU, when you want to use RWS .22 l.r. R 100 rimfire cartridges in biathlon. The bullet weight is exactly 2.675 +/- 0.005 grams.
•High velocity in the supersonic range
•Suitable for shooting at both 50 and 100 meters
•High precision in silhouette shooting with rifle and pistol
•Also an excellent choice for biathletes
Made in Stadeln, Germany.
Dimensions:
Bullet weight: 2.6 grams / 40 grains
Profile: Round Nose
Velocity:
Muzzle: 345 (m/sec) / 1132 (ft/sec)
50m: 304 (m/sec) / 997 (ft/sec)
100m : 277 (m/sec) / 909 (ft/sec)
Energy:
Muzzle: 155 J / 114 (ft.lb)
50m: 120 J / 88.5 (ft.lb)
100m: 100 J / 74 (ft.lb)
Special Match
•Very high quality match ammunition (close to R50)
•Excellent price to performance ratio
Made in Stadeln, Germany.
Dimensions:
Bullet weight: 2.6 grams / 40 grains
Profile: Round Nose
Velocity:
Muzzle: 330 (m/sec) / 1083 (ft/sec)
50m: 294 (m/sec) / 965 (ft/sec)
100m : 271 (m/sec) / 889 (ft/sec)
Energy:
Muzzle: 142 J / 105 (ft.lb)
50m: 113 J / 83 (ft.lb)
100m: 95 J / 70 (ft.lb)
R100 is a little faster than R50 but still subsonic.
http://www.fosterguns.com/
Foster Bear Arms had both R50 and R100 in stock the last time I was there. At 0.24 to 0.40 per round, it seems to me that these are overkill ($) for most bullseye pistol matches and are better suited to benchrest matches.